System.OutOfMemoryException: Insufficient memory to continue the execution of the program. at System.Text.StringBuilder.ExpandByABlock(Int32 minBlockCharCount) at System.Text.StringBuilder.AppendWithExpansion(Char value) at System.Text.StringBuilder.Append(Char value) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Utilities.CrossReferenceCollectionReader.GetAllText(Reader reader, Int64 minOffset, Int64 maxOffset) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Utilities.CrossReferenceCollectionReader.FindAllObjectOffsets(Reader reader, Dictionary`2 tokenToOffsets, Int64 minOffset, Int64 maxOffset)
When calling a PDF export in a high-concurrency environment the internal state can get corrupted because it uses a non-thread safe collection internally.
Sample code:
void WriteToPdf(RadFlowDocument document, Stream outputStream) {
PdfFormatProvider pdfWriter = new() {};
pdfWriter.Export(document, outputStream);
}
When calling it like this:
Parallel.ForEachAsync(listOfDocuments, (document, _) => { WriteToPdf(document, Stream.Null); });
An exception may occur:
System.InvalidOperationException: Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.
at System.Collections.Generic.Dictionary`2.FindValue(TKey key)
at Telerik.Windows.Documents.Fixed.Model.Fonts.FontsRepository.TryCreateFont(FontFamily fontFamily, FontStyle fontStyle, FontWeight fontWeight, FontBase& font)
at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Utils.Extensions.CopyPropertiesFrom(CharacterProperties fixedProperties, PdfExportContext context, CharacterProperties properties)
at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.CreateListLevel(ListLevel flowLevel)
at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.CreateList(List flowList)
at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportDocument(RadFlowDocument document, RadFixedDocumentEditor editor)
at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportInternal()
at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Export(T document, Stream output)
at xxxxx.Application.Common.PdfGeneration.PdfWriter.WriteToPdf(RadFlowDocument document, Stream outputStream)
The state is then corrupted forever, until the application is restarted.
Realistic scenario where this is also reproduced: Web application that generates PDFs and is called concurrently.
This is the code used for merging:
private void MergeDifferentDocumentsPagesWithFixed()
{
string[] documentsToMerge =
{
"14301-STOCK_Proforma.pdf",
"14302-STOCK_Proforma.pdf",
"14303-STOCK_Proforma.pdf",
"14304-STOCK_Proforma.pdf",
"14305-STOCK_Proforma.pdf",
"14330-STOCK_Proforma.pdf"
};
RadFixedDocument doc = new RadFixedDocument();
PdfFormatProvider provider = new PdfFormatProvider();
foreach (string current_item in documentsToMerge)
{
string path = @"..\..\Samples\" + current_item;
RadFixedDocument docToMerge;
if (!File.Exists(path))
{
continue;
}
using (Stream stream = File.OpenRead(path))
{
docToMerge = provider.Import(stream);
}
doc.Merge(docToMerge);
}
string outputFilePath = @"..\..\mergedFixed.pdf";
File.Delete(outputFilePath);
using (Stream output = File.OpenWrite(outputFilePath))
{
provider.Export(doc, output);
}
Process.Start(new ProcessStartInfo() { FileName = outputFilePath, UseShellExecute = true });
}
Workaround:
private void MergeDifferentDocumentsPages(string resultFileName)
{
string[] documentsToMerge =
{
"14301-STOCK_Proforma.pdf",
"14302-STOCK_Proforma.pdf",
"14303-STOCK_Proforma.pdf",
"14304-STOCK_Proforma.pdf",
"14305-STOCK_Proforma.pdf",
"14330-STOCK_Proforma.pdf"
};
File.Delete(resultFileName);
using (PdfStreamWriter fileWriter = new PdfStreamWriter(File.OpenWrite(resultFileName)))
{
foreach (string documentName in documentsToMerge)
{
string path = @"..\..\Samples\" + documentName;
using (PdfFileSource fileToMerge = new PdfFileSource(File.OpenRead(path)))
{
foreach (PdfPageSource pageToMerge in fileToMerge.Pages)
{
fileWriter.WritePage(pageToMerge);
}
}
}
}
Process.Start(new ProcessStartInfo() { FileName = resultFileName, UseShellExecute = true });
}
This is the code snippet for reproducing the error message:
static void Main(string[] args)
{
string filePath = "Lorem ipsum dolor sit amet.pdf";
//load a random document
PdfFormatProvider provider = new PdfFormatProvider();
RadFixedDocument originalDocument;
using (Stream stream = File.OpenRead(filePath))
{
originalDocument = provider.Import(stream);
}
//draw something on the first page
FixedContentEditor editor = new FixedContentEditor(originalDocument.Pages[0]);
editor.GraphicProperties.IsFilled = true;
editor.GraphicProperties.FillColor = RgbColors.Black;
Telerik.Documents.Primitives.Rect Rect = new Telerik.Documents.Primitives.Rect(10, 10, 200, 100);
editor.DrawRectangle(Rect);
//export the pages as images and build a brand new document from the images
SkiaImageFormatProvider imageProvider = new SkiaImageFormatProvider();
imageProvider.ExportSettings.ImageFormat = SkiaImageFormat.Jpeg;
imageProvider.ExportSettings.ScaleFactor = 0.8;
imageProvider.ExportSettings.Quality = 80;
RadFixedDocument doc = new RadFixedDocument();
foreach (RadFixedPage page in originalDocument.Pages)
{
byte[] resultImage = imageProvider.Export(page);
RadFixedPage pdfpage = doc.Pages.AddPage();
editor = new FixedContentEditor(pdfpage);
Stream imageStream = new MemoryStream(resultImage);
editor.DrawImage(imageStream);
}
//export the pdf built from the images
PdfFormatProvider pdfFormatProvider = new PdfFormatProvider();
string outputPdf = @"output.pdf";
File.Delete(outputPdf);
using (Stream output = File.OpenWrite(outputPdf))
{
pdfFormatProvider.Export(doc, output);
}
Process.Start(new ProcessStartInfo() { FileName = outputPdf, UseShellExecute = true });
}
Workaround:
static void Main(string[] args)
{
string filePath = "Lorem ipsum dolor sit amet.pdf";
//load a random document
PdfFormatProvider provider = new PdfFormatProvider();
RadFixedDocument originalDocument;
using (Stream stream = File.OpenRead(filePath))
{
originalDocument = provider.Import(stream);
}
//draw something on the first page
FixedContentEditor editor = new FixedContentEditor(originalDocument.Pages[0]);
editor.GraphicProperties.IsFilled = true;
editor.GraphicProperties.FillColor = RgbColors.Black;
Telerik.Documents.Primitives.Rect Rect = new Telerik.Documents.Primitives.Rect(10, 10, 200, 100);
editor.DrawRectangle(Rect);
using (Stream output = File.OpenWrite(filePath))
{
provider.Export(originalDocument, output);
}
using (Stream stream = File.OpenRead(filePath))
{
originalDocument = provider.Import(stream);
}
//export the pages as images and build a brand new document from the images
SkiaImageFormatProvider imageProvider = new SkiaImageFormatProvider();
imageProvider.ExportSettings.ImageFormat = SkiaImageFormat.Jpeg;
imageProvider.ExportSettings.ScaleFactor = 0.8;
imageProvider.ExportSettings.Quality = 80;
RadFixedDocument doc = new RadFixedDocument();
foreach (RadFixedPage page in originalDocument.Pages)
{
byte[] resultImage = imageProvider.Export(page);
RadFixedPage pdfpage = doc.Pages.AddPage();
editor = new FixedContentEditor(pdfpage);
Stream imageStream = new MemoryStream(resultImage);
editor.DrawImage(imageStream);
}
//export the pdf built from the images
PdfFormatProvider pdfFormatProvider = new PdfFormatProvider();
string outputPdf = @"output.pdf";
File.Delete(outputPdf);
using (Stream output = File.OpenWrite(outputPdf))
{
pdfFormatProvider.Export(doc, output);
}
Process.Start(new ProcessStartInfo() { FileName = outputPdf, UseShellExecute = true });
}
NumberedHierarchical list type has inconsistent indentation after bullets.
InvalidOperationException is thrown when exporting font that is available but not used. The stack trace is as follows: at System.Linq.Enumerable.Max(IEnumerable`1 source) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.Cid.CidSet.CopyPropertiesFrom(IPdfExportContext context, FontBase font) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.CidFontDescriptor.CalculateCidSet(IPdfExportContext context, CidFontBase font) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.CidFontDescriptor.<>c__DisplayClass34.<CopyPropertiesFrom>b__30() at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Utilities.PdfObjectsExtensions.ToPrimitive[P,T](PdfProperty`1 pdfProperty, Func`2 convertToPrimitive, Func`1 getDefaultValue) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.CidFontDescriptor.CopyPropertiesFrom(IPdfExportContext context, FontBase font) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.CidFontObject.CopyPropertiesFromOverride(IPdfExportContext context, FontBase font) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.CidFontObject.CopyPropertiesFrom(IPdfExportContext context, FontBase font) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.Type0FontObject.CopyPropertiesFromOverride(IPdfExportContext context, FontBase font) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Export.PdfExporter.WriteFontsFromContext(PdfWriter writer, IPdfExportContext context) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Export.PdfExporter.Export(IRadFixedDocumentExportContext context, Stream output) at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ExportOverride(RadFixedDocument document, Stream output) at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Export(T document, Stream output)
The visual fill element is not exported to pdf:
Only the text part is present.
Import the document with RadSpreadProcessing and export it PDF format. You will notice that the cell value is displayed in the exported PDF document while in the Excel file it is hidden due to the custom format:
A page with a negative value rotation is exported as a blank image.
Workaround: Use only the Enum Rotation values (Rotate0, Rotate90, Rotate180, Rotate270).
Merge two documents (use the attached ones) that already have embedded files with the same names.
Observed:
at Telerik.Windows.Documents.Core.Fonts.Type1.Type1Format.Type1FontSource.GetFontFamily()